Hi there Leo650,
Welcome to Apple Support Communities. Do you have access to a Mac or Windows PC with iTunes installed? If so, follow the steps in this Apple Support article to check and manage your iPhone storage: How to check the storage on your iPhone and iPad - Apple Support
Use the Finder or iTunes to check the storage on your iOS device
1. On a Mac with macOS Catalina 10.15 or later, open the Finder. On a Mac with macOS Mojave 10.14 or earlier, or on a PC, open iTunes.
2. Connect your device to your computer.
3. Select your device in the Finder or in iTunes. You'll see a bar that shows how much storage your content uses, divided by content type.
4. Move your mouse over the bar to see how much storage each content type is using.
Use recommendations to optimize storage
In the Storage section of Settings, your device might offer recommendations for optimizing your storage. To optimize your storage:
1. Tap Show All to see all the recommendations for your device.
2. Read the description of each recommendation, then tap Enable to turn it on or tap the recommendation to review the contents you can delete.
Feel free to reach back out if you have any questions.
We hope this helps you.